Electromotor.



B. P. HUTCHES, JR. BLECTROMOTOR.

APPLICATION FILED MAY 3,1910.

1,1 1 6,705, Patented Nov. 10, 1914.

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Fay. J.

WITNESSES:

TTORN Y8 B. P. HUTGHES, JR ELECTROMOTOR.

APPLICATION FILED MAY 3, 1910 1,1 1 6,705, Patented Nov. 10, 1914.

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BENJAMIN F. HUTGHES, 33., 0F ALLENDAL'E, NEW JERSEY.

ELECTROMOTOR.

Specification of Letters Patent.

Patented Nov. 10, 1914..

Application filed May 3, 1910. Serial No. 559,193.

To all whom it may concern Be it known that I, BENJAMIN F. HUTCHES, Jr.,a citizen of the United States, residing at Allendale, county of Bergen,State of New Jersey, have invented new and useful Improvements inElectromotors, of which the following is a specification.

This invention relates to an electromotor of novel construction whichpossesses high efliciency though of comparatively small size.

The electromotor is so constructed that its component parts may bereadily assembled and separated so that any worn out or otherwisedamaged elements may be readily replaced without skilled labor.

Although the construction is more particularly intended for applicationto motors of comparatively low power, I desire it to be understood thatits various novel features may also be embodied in motors of largersizes.

In the accompanying drawing: Figure 1 is an end View partly in sectionof my improved electromotor, Fig. 2 a side view thereof, Fig. 3 avertical cross section on line 3-3, Fig. 5, Fig. 4 a detail of part .ofthe mutilated yoke, Fig. 5 a vertical longitudinal section on line 5-5,Fig. 1, Fig. 6 a view similar to Fig. 1, with the brushsupporting capremoved, Fig. 7 an axial section through one of the armature-poles, Fig.8 a cross section through the central field magnet, Fig. 9 a face Viewof one of the field pole shoes, and Fig. 10 a wiring diagram of themotor.

The bipolar centrally disposed ,field magnet A is, by screws 15, securedto a stationary plate 16 made of unmagnetizable material, such as brass.The field magnet A, preferably comprises a central block 17, a pair ofalined cores 18 carrying field windings 19, and a pair of pole shoes 20,the parts 17, 18 and 20 being held together by screws 21. Block 17 iscentrally perforated and is provided with a bushing 22, thus con--stituting the bearing for the motor shaft 23.

Around field magnet A is adapted to re volve the armature B whichcomprises essentially a disk or carrier 24 and a series'of polesprovided with the armature coils 25.

Disk 24 has an-elongated hub or sleeve 26 secured to shaft 23 by a screw27 or other- 'wise. Each pole is composed of a core 28,

riveted to a curved inner pole shoe'29, which is provided with a flange30 secured to disk 24 by a screw 31. The ends of windings 25 arepermanently connected to a pair of metal rings 32 insulated from eachother and from cores 28 as at 33. Rings 32 are provided with integralresilient tongues or contact members 34 that extend in oppositedirections from the poles and are of such a length and configurationthat the tongues of adjoining poles will come into contact with onevanother, when the poles are secured to disk 24 by screws 31. Eachcontacting tongue pair is engaged by the free outer end of a contactspring 35 firmly embedded within an insulating bushing 36; which isfitted into a corresponding perforation of disk 24. The inner end ofeach spring 25 bears against the radially extending flange 37 of one ofthe commutator segments 38. The latter are mounted upon a flanged sleeve39 encircling hub 26 of disk 24 and securely held thereto by screw 27.

Segments 38 have dove-tailed inner ends I and are clamped to sleeve 39by a threaded ring 40, the segments being insulated from one another andfrom parts 39, 40 by insulating sheets 41 as usual.

The commutator brushes consist preferably of carbon blocks 42 looselymonted in a pair of diametrically opposed boxes 43 and held inengagement with the commutator by springs 44. Boxes 43, are by clampplates 45 and screws 46 secured to an an nulus 47 of insulatingmaterial. This annulus is slotted as at 48 for the passage of screws 49which adjustably hold it to a stationary flanged plate 50.

of force emanating from the poles of the .field magnet, and therebyincreasing the electromotive forces induced in the armature conductorswhile passing said poles. auxiliary field magnets 51 may be providedwhich should be arranged in axial alinement with the central fieldmagnet. These auxiliary magnets are provided with inner pole shoes 52,while thelr outer poles are 'magneticallv connected by a curved yoke 53that constitutes the lower section of the motor casing. Above magnets51, the casing may be formed by a curved segmental ring 54 made ofunmagnztizable material. In order to regulate the concentratingctficiency of the auxiliary field magnets, yoke 53 may be more or lessmutilated as at 55, thereby decreasing correspondingly the magneticconductivity of said yoke.

Plate is secured to yoke 53 and segment 54 by screws 56, while plate 16is circumferentially recessed as at 57 to be driven into and securelyheld to yoke 53 and segment 54. A base plate 58 may be secured to yoke53 by screws 59 to form a proper support for the motor.

' An oil tube 61 passing through segment 54, block 17 and bushing 22 maybe provided for properly lubricating the shaft hearing.

The wiring .of the motor is preferably effected as shown in Fig. 10, thecurrent flowing as follows: from live wire 62 through first brush 42,armature coils 25, second brush 42, the coil of first auxiliary field-magnet 51, central field. magnet coils 19, second auxiliary fieldmagnet 51 to live wire 63. i It will be seen that by the constructiondescribed, all objectionable solder connections between the severalarmature coils, and be-- tween the latter andthe commutator segments aredispensed with. l/Vhen assembling the armature parts, 2'. 6. when thepole shoes 29 of the armature coils are secured to disk '24, the tongues34 of adjoining coils will come into contact with each other and withone of the contact springs 35 leading to the commutatorsegments. Thus ifone of the coils 25 should become defective through short circuits orotherwise, the armature may be readily repaired by simply replacing theinjured pole with a similar mtact pole which may be kept in reserve forthis purpose. So also, if the commutator should require repair, it maybe withdrawn from hub. 26 after loosening screw 27. When the commutatoris refitted to hub 26, the connection between its segments and thearmature conductors is automatically reestablished owing to thefrictional contact between flanges 37 nd springs 35. By virtue of theemployment of the core of the field magnet A as the shaft-bearin spaceis economized, so that the size of t e electromotor-is reduced to aminimum.

I claim: I

1. An electromotor, comprising a .centrally arranged stationary fieldmagnet, a shaft journaled in sald magnet, a carrier secured to saidshaft, a plurality of pole shoes secured to the carrier, magnetizablecores secured to the pole shoes, and coils surrounding the cores andhaving laterally extending conductive contact pieces, each contact pieceof one coil contacting with the opposed contact piece of the adjoiningcoil.

2. An electromotor comprising a centrally arranged stationary fieldmagnet, a shaft journaled in said magnet, a plurality of armature coressecured to the shaft, coils surrounding the cores,- insulated conductiverings on the cores and connected to the ends of the coils, and tonguesprojecting in -oppo-" site directions from the rings, each tongue ofjoining coils.

the coils each member of one coil contacting With the opposed member ofthe adjoining coil, 9, contact spring engaging each contactingmember-pair, and a commutator segmentengaged by each contact-spring.

4. An electromotor, comprising a centrally arranged stationary fieldmagnet, a shaft journaled in said magnet, a perforated carrier securedto the shaft, armature cores secured to the carrier, coils surroundingthe cores, laterally extending conductive members connected to the endsof the coils, each member of one coil contacting posed member of theadjoining coil, insulating bushings fitted into thecarrier-perforatrons, a spring passing through each bushmg andcontactually engaging one of the contacting member-pairs, and acommutator segment engaged by each spring.

5. An electromotor comprising a centrally arranged stationary fieldmagnet, a

shaft journaled in said magnet, a plurality,

of armature cores secured to the shaft, coils surrounding the cores,contacting members connecting the ends of adjoining coils, contactsprings engaging said members, and commutator-segments having flangesthat are engaged by the contact-springs.

6. An electromotor, comprising a centrally arranged stationary fieldmagnet, a shaft ournaled in said magnet, a carrier having an elongatedhub secured to the shaft, a plurality of armature coils fastened to thecarrier, a commutator embracing the hub and having a plurality ofinsulated segments, and contact-springs that contactualliy connect eachsegment with the ends of a 7 In an electromotor, a support, a plurahtyof magnetizable cores removably secured thereto, coils surrounding thecores, and resil ent conductive members extending in opposite directionsfrom said coils and connected to the respective coil ends, the membersof any one coil contacting directly Wll'ih the opposed members of theadjoining 001 s.

8 .'In an electromotor, a support, a plurahty of magnetizable coresremovably secured thereto, coils surrounding said cores, and resilientconductive members on said coils, each member of one coil contactingdirectly with the opposed member of the adoining coil.

9. An electromotor comprising a centrally arranged field magnet, a shaftjournaled therein, a carrier secured to said shaft,

- a plurality of magnetizable cores removably secured to the carrier,coils surrounding the cores and having laterally extending conductivemembers, the members of any one coil contacting with the opposed membersof the adjoining coils.

10. An electromotor comprising a centrally arranged stationary fieldmagnet, a shaft journaled therein, a carrier secured to said shaft, aplurality of magnetizable cores removably secured to the carrier, coilssurrounding the cores and having laterally extending conductive members,the members of any one coil contacting with the opposed members of theadjoining coils, a commutator, and means for connecting each contactingmember-pair with one commutatorsegment.

BENJAMIN F. HUTCHES, JR. Witnesses:

FRANK v. BRIESEN, ARTHUR E. ZUMPE.

